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openrocket

GitHub Repo Pretty sure · Old faithful, not hype
https://github.com/openrocket/openrocket

A 20-year-old rocketry simulator that actually works, has a real user base, and doesn't pretend to be AI-powered. The README-to-substance ratio is finally inverted.

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Slop 5%Signal 70%Science 25%

OpenRocket is a legitimate engineering tool with 6DOF flight simulation, cross-platform support (Java), active maintenance, real documentation, and an actual community (Discord, Crowdin translations). The README has badges but also substance—design tools, 3D visualization, export formats for 3D printing/laser cutting. Signal is high because amateur rocketry clubs and aerospace students use this to ship real rockets. Science score is modest because it's mature engineering rather than novel res...

2093 stars Java 2026-03-19 4919 days old

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